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TROJ_CVE20131331.AI

May 05, 2016
 ALIASES:

Exploit.OLE2.CVE-2013-1331.b (Kaspersky), Exploit-FJM!CVE2013-1331 (McAfee), Win32/Exploit.CVE-2013-1331.C trojan (ESET)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Spammed via email


This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

As of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

Varies

File Type:

DOC

Initial Samples Received Date:

02 May 2016

Payload:

Downloads files

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

Download Routine

This Trojan accesses the following websites to download files:

  • http://intent.{BLOCKED}space.com/users/web11_focus/3807/vw.php?i=b67575-3b193a64f50480306d6fa3be1d0163f4
  • http://intent.{BLOCKED}space.com/users/web11_focus/3807/space.gif..............................................................................................................................................php?a=67575-80f27a85a4383ea2f92e8ba46c728ba3
  • http://mister.{BLOCKED}space.com/users/web8_dice/3791/vw.php?i=b66995-151bbf2f5ae48d1c90a48ab9447b4809
  • http://mister.{BLOCKED}space.com/users/web8_dice/3791/space.gif..............................................................................................................................................php?a=66995-83fcb7c8e552c81da5611e93a856a399
  • http://www.police28122011.{BLOCKED}s.net/pages/013/vw.php?i=b013-508a786751993165b95aa9fef3da38ef
  • http://www.police28122011.{BLOCKED}s.net/pages/013/space.gif..............................................................................................................................................php?a=013-8354f8a7f3c21f58d7dbfa2a943c88b8
  • http://mister.{BLOCKED}space.com/users/web8_dice/4226/vw.php?i=b81425-4b3477a6a8c6ddd4c8de52730f46d1cf
  • http://mister.{BLOCKED}space.com/users/web8_dice/4226/space.gif..............................................................................................................................................php?a=81425-3b068ea3d53786a94aaa715c7692a0a1
  • http://intent.{BLOCKED}space.com/users/web11_focus/4307/vw.php?i=b84435-f14906fa70314e9dffaf0002e59cfe8f
  • http://intent.{BLOCKED}space.com/users/web11_focus/4307/space.gif..............................................................................................................................................php?a=84435-81782ff9e4e204717db82d2e43a76f2d

It takes advantage of the following software vulnerabilities to download possibly malicious files:

  • Office Buffer Overflow Vulnerability (CVE-2013-1331)

As of this writing, the said sites are inaccessible.

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.502.07

FIRST VSAPI PATTERN DATE:

02 May 2016

VSAPI OPR PATTERN File:

12.503.00

VSAPI OPR PATTERN Date:

03 May 2016

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_CVE20131331.AI . If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.

Step 4

Download and apply this security patch Refrain from using these products until the appropriate patches have been installed. Trend Micro advises users to download critical patches upon release by vendors.


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